my family is rude

My mom and her two sisters and grandma went to dinner for mother's day.. they didnt invite me only because i'm not a mom. It kinda hurt me because i wanted to go and eat with them.. Didn't know non moms aren't allowed.. me and my boyfriend been trying for a baby and i haven't fallen pregnant ... They don't know this but it hurts so after they dropped off my mom , i went outside and said how come i wasn't invited? And then my moms sister said BECAUSE YOUR NOT A MOM! my heart shattered into pieces .. I paused for a sec because i was going to cry but tried to play it offf and say oh okay.. Now i'm balling my eyes out right now My heart hurts... how can people be so cruel ......... i want to kill my self